The microwave/convection oven is in our motorhome and has performed as expected for 3 years. Yesterday my wife was using the convection oven and part way into the baking cycle it stopped. The microwave and the convection oven will not work. All the other functions work, the lights on the panel light, the fan runs, under the oven light works, etc. Is it possible this could be a blown fuse? Thanks for any advice.